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| Questão | Responda |
| Renewable resource | capable of being naturally replaced; examples: plants, sunlight, wind, water |
| Nonrenewable resource | resource that cannot be naturally replaced at a pace quick enough to keep up with consumption; examples: fossil fuels, soil, minerals |
| Greenhouse Effect | trapping the sun's warmth in a planet's lower atmosphere; critical for life on Earth |
| carbon cycle | the process that moves carbon between plants, animals, microbes, minerals in the earth; and the atmosphere |
| atmosphere | envelope of gases surrounding the Earth |
| organism | an individual animal, plant, or single-celled life form |
| Fossil fuels | energy source made from decomposing plants and animals |
| carbon dioxide | a greenhouse gas made of one carbon atom and two oxygen atoms. Made by natural processes (breathing) and by burning of fossil fuels. |
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deforestation
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cutting down trees in a forest to use the wood for lumber, farming or building. |
| enhanced greenhouse effect | human caused increase of greenhouse gases in our atmosphere trap too much of the Sun's energy and warms the planet |
| sustainable farming | plant and animal farming that is productive without harming the environment for the future |
| greenhouse gases | any gas that absorbs infrared radiation (the sun’s energy re-emitted from Earth), Examples: carbon dioxide, methane, water vapor |
| greenhouse | a glass building that traps the heat energy from the sun to allow plants to grow when it is cold outside |
| Water conservation | the practice of using water efficiently to reduce unnecessary water usage |
| Human Population Growth | The increase in the number of people on Earth |
| Carbon Footprint | the total amount of greenhouse gases that are generated by our actions |
| Tragedy of the Commons | a situation in which individuals with access to a public resource act in their own interest and, in doing so, ultimately deplete the resource. |
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